But some of the tariff conditions hadn't taken effect yet and it doesn't explain the Biden administration strengthening some of the trade terms in the US's favor. Trump's team went back to them with 2018 was then would lessen the terms if the Chinese agreed to buy more American-made products. They failed to do that, so Biden claimed he was going to review the terms, but never did. I can't think of almost any trade deals that were largely augmented. He lessened tariffs on steel, aluminum and Airbus components with the EU... if they stopped putting tariffs on Harley-Davidsons. The reengagement with the WTO was perfunctory and the Paris Agreement is generally meaningless.